Eastern Athabasca Basin, Saskatchewan, Canada
Uconformity sandstone hosted uranium
- Comprises one claim totaling 5,961 hectares and is located 37 kilometres west of the Larocque East property which hosts the Hurricane zone
- Multiple highly prospective targets across 15-km strike being advanced with drilling and geophysics
- Drilling indicates the vertical depth to the unconformity is 600 to 700 metres
- Drilling intersected brittle structures associated with unconformity offset, alteration, and elevated radioactivity
- ANT survey identified large velocity low anomaly located 850 m along trend to the north
The Hawk project lies along a major northeast trending fault zone that crosses the Athabasca Basin. The basement geology of the project area is dominated by northeast trending graphitic bearing meta-sediments bounded by granitic rocks the the east and west.
The residual prospectivity of the Hawk project is considered very high as there are over 15 kms of a conductive corridor spatially associated with the regional northeast trending fault zone that is known to host uranium mineralization. Historically the area has seen very little exploration and represents a new frontier as exploration in the basin moves westward.
To date IsoEnergy has confirmed that the key characteristics of the Athabasca style uranium mineral system exist within the claim block:
1) hydrothermal clay alteration in the sandstone cover and basement rocks;
2) radioactivity at the unconformity;
3) brittle fault structures and
4) conductive metasedimentary rocks in the basement.
Drilling at Hawk totaled 6,144m and tested electromagnetic conductors identified in the 2022/2023 geophysical surveys. Summer drilling comprised two holes that were completed to target and two holes that encountered poor ground conditions in the upper sandstone cover sequence and had to be abandoned as a result leaving a highly prospective untested target that will be tested during a future drill program. Drilling successfully intersected prospective brittle structures and alteration in hole HK23-08. The basal sandstone in hole HK23-08 is moderately bleached with metre-scale zones of desilicification and illite/chlorite clay alteration that are associated with structure A broken and illite/chlorite clay altered fault zone was intersected in the basement from 691 to 707 m downhole. The unconformity surface is offset by this fault zone, and a sandstone wedge is present within the fault zone between 691 and 693m. There is a ~16.5m west-side-up reverse component of displacement of the unconformity.
In addition to exploration drilling, an ANT survey was conducted over 7.3 km of the main north-northeast trending ZTEM conductivity corridor and has defined a large velocity low anomaly that is coincident with both the on strike projection of the altered brittle fault zone intersected in drill holes HK23-03/05A/08 and the strong conductor picks identified in the winter 2023 ground EM survey (IsoEnergy Ltd News Release April, 2023). Similar to the ANT signature that is associated with the Hurricane deposit, the velocity low is interpreted as the result of a large hydrothermal system that has altered the sandstone cover sequence above the unconformity target.